采用FPGA芯片对，CCD摄像头的输出的模拟视频信号进行采集，转换为640*480分辨率的视频数据，并暂存于外部SRAM或SDRAM中-The FPGA chip, the output of the CCD camera analog video signal acquisition, converted to 640* 480 resolution video data, and temporarily stored in the external SRAM or SDRAM